Method of emptying beating-engines.



No. 724,880. PATENTED APR. 7, 1903. E. A. JONES.

METHOD OF EMPTYING BBATING ENGINES.

APPLICATION FILED MAR. 13, 1902.

N0 MODEL. 2 SHEE'I .S8HBET l.

IN VE N TOR Edwardfl .7008) PATENTED A117, 1903.

E. A. JONES. METHOD 0]?" EMPTYING BEATING ENGINES.

APPLIOATION FILED MAR. 13, 1902.

H0 MODEL.

2 SHEETS-SHEET 2.

' //v VENTOI? Edward 9? .jbizar WITNESSES IATTOHNEYS UNITED STATES P TENT OFFICE.

EDWARDASJO'NESQ'QF PITTSFIELD, MASSACHUSETTS.

METHOD 0:? E MPTYlNG B'EATVINGQ-E'NGINES.

erEcrFroArIoN forming part of Letters Patent no. 724,880, dated April 7, 1903. .Applioatien filed MarchlS, I902. Serial No. 98,034. -(No model) To aZZ whom, it may concern Be it known that- 1, EDWARD A. J on s, a citizen of the United States, and a resident of Pittsfield,in the county of Berkshire and State of Massachusetts, have invented a 'new and Improved Method of Emptying Beating-Engines, of which the following is a full, clear, and exact description.

The invention relates to the manufacture of paper; and its object is to provide a new and improved method of emptying from heating-engines the finished pulp in a thorough, quick, and economical manner Without requiring manuallywielded rakes for moving the pulp to the discharge-pipe of the vat, as heretofore practiced.

The method consists, essentially, in subjecting the pulp in the vat of the beating-engine to the action of a forceful undercurrent to set the pulp in motion and direct it to the discharge-pipe of the vat.

In order to carry this method into eifect, I prefer 'to employ a beating-engine such as shown, for instance, in the accompanying drawings, forming a part of this specification, in which similar characters of-reference indicate corresponding parts in all the views.

Figure 1 is a plan view of the beating-engine, parts being broken out. Fig. 2 is a longitudinal sectional elevation of. the same, parts bein g shown in elevation. Fig. 3 is an enlarged transverse section offpart of the same on the lines 3 3 of Figs.1 and 4, and Fig. 4 is a sectional plan vieWof the same.

In emptying beating-engines of the pulp as heretofore practiced it was necessary to employ rakes, by the use of which the attendant in charge of the beating-engine raked the fin ished pulp from the head end of the vat and from the return side down to the dischargepipe in the lower end of the vat. As such finished pulp is of about a semifluid consistency, it adheres strongly to the sides and bottom ofthe vat, and hence does not flow readily by its own gravity to the discharge-pipe.

Now in order to empty the vat quickly and without manual labor I subject the bottom portion of the sluggish pulp mass to the action of one or more forceful under-currents produced by jets of water or other fluid under pressure. I prefer to make use of two distinct undercurrents-0ne to act on the pulp at the rear of the backfall and the otherat the return side of the vat-so that the pulp is readily set in motion and carried to the discharge-pipe of the vat,

The beating-engine shown in the drawings consists ot'a vat A, having the beating-drum B, backfall O, mid-feather D, and dischargepipe E, leading from the lower end of the vat at the bottom A thereof to carry the pulp to a suitable place of discharges Under the rear wall of the backfall C is arranged a pressurechamber F, extending from the front side of the vat A to the mid-feather D, and the said pressure-chamber is formed with a jet-opening F for discharging water under pressure into or under the pulp or stock at the bottom of the vat and in the direction in which the pulp or stock is intended to flow. A supplypipe G opens into the pressure-chamber F and is connected with a suitable supply, such asa tank containing water located overhead,

to discharge water under pressure into the pressure-chamber F, the water then passing under pressure out of the jet-opening F.

A short pipe G extends through the midfeather D'to connect the pressure-chamber F with a second pressure-chamber H, formed under a portion: of thegusset I at the return side of the mid-feather D, as plainly indicated in thedrawings, special reference being had to Figs. 1, 3, and 4. From the pressure-chamber H lead a number of jet-openings I,formed by making the gusset I in sections 1 set at angles one to the other and slightly spaced apart at the overlapping ends. (See Fig. 4E.)

Now it will be seen that a portion of the Water or other fluid passing through the pipe G'into; the pressure-chamber H passes under pressure into' the pressure-chamber H and through the jet-openings I under the pulp at the return side of the vat to insure a ready flow of the pulp down to the discharge-pipe E. The jet-openings I may also be formed by. perforations in the sections I and are preferably soylocated as to send the jets of water laterally in fan shape toreach the entirelower'portion of the mass flowing down the'returnside of the vat. Thus when the wateris turned on in the pipe G the Water flowing out under pressure from the pressurechamber F imparts an initial motion to the pulp, so as to start the latter around the upper end of the vat A, and then the jets from the openings 1 aid the downward flow of the pulp to insure a rapid emptying of the pulp from the vat without the assistance of rakes wielded by the attendant of the machine,

Having thus described my invention, I claim as new and desire to secure by Letters Patent-- 1. The herein-described method of emptying beating-engines, consisting in subjecting the bottom portion of the pulp in the vat to the action of a jet of a fluid under pressure at a. point substantially in the immediate rear of the backfall to produce an undercurrent to carry the pulp around the upper end of the vat and down on the return side of the midieatiier to the discharge end of the vat, as set ort 2. The herein-described method for emptying beating-engines, consisting in subjecting the bottom portion of the pulp in the vat to the action of a jet of water under pressure to produce an initial undercurrent at the rear end of the backfall, to move the pulp around the upper end of the vat to the return side thereof, and then subjecting the pulp on the return side to the action of jets of water under pressure to produce a second undercurrent, to float it to the discharge-pipe at the lower end of the vat, as set forth.

3. The herein-described method of emptying beating-engines, consisting in subjecting the bottom portion of the pulp in the vat to the action of a jet of water in sheet form to produce an initial movement of the pulp at the rear end of the backfall to carry it around the upper end of the vat and onto the return side of the mid-feather, and then subjecting the pulp on the return side of the mid-feather to a plurality of lateral jets of water in sheet form and issuing from the mid-feather side of the vat, to continue the movement of the pulp to the discharge end of the vat, asset forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

EDWARD A. JONES.

Witnesses:

THEO. G. I-IosTER, EVERABD BOLTON MARSHALL. 

